Robert E. L. Rainey (1914–2002) was an American artist, art educator and advertising executive.
[1] Initially a watercolorist, Rainey specialized in rural and urban scenes in the Midwest characterized by very strong color.
Later he originated a medium he called "petronexus"—bas-relief paintings of wood, stone, jesso, and color.
His wife, Herta M. L. Kracher Rainey (1917–2006) was a printmaker, potter, and art educator.
She was also a graduate of the Chicago Art Institute and had previously studied under Franz Cižek.